https://bugzilla.novell.com/show_bug.cgi?id=465875
Summary: System.Core Lookup<TKey,TElement> does not use the
specified comparer
Classification: Mono
Product: Mono: Class Libraries
Version: 2.0.x
Platform: x86
OS/Version: Linux
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Sys.Core
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Found By: ---
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1;
NET CLR 2.0.50727; Media Center PC 5.0; InfoPath.2; .NET CLR 3.5.20706; .NET
CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30618)
The IEqualityComparer passed to ToLookup is not honored. This result in the
wrong comparison. It looks like the comparer is not passed to the dictionary
that implements lookup.
We would greatly appreciate a fix for this in 2.2.
Reproducible: Always
Steps to Reproduce:
private class Color
{
public string Name;
public int Value;
}
[Test]
public void LookupCase()
{
Color[] colors = new Color[]
{
new Color() { Name = "red", Value = 0xFF0000 },
new Color() { Name = "green", Value = 0x00FF00 },
new Color() { Name = "blue", Value = 0x0000FF },
};
Lookup<string, int> lookup = colors.ToLookup(c => c.Name, c =>
c.Value, StringComparer.OrdinalIgnoreCase) as Lookup<string, int>;
Assert.AreEqual(lookup["Red"].First(), 0xFF0000);
}
Actual Results:
KeyNotFoundException thrown.
Expected Results:
No exception thrown.
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